Energy

Energy is the ability or capacity to do work and cause change in the world around us, whether that means moving an object, heating something up, or powering a light bulb. It exists in many forms—like the heat from the sun, the motion of a speeding car, the chemical energy stored in food, or the electricity flowing through your home—and it can transform from one form to another but is never actually created or destroyed. Understanding energy helps us explain how everything from our bodies to the universe itself actually works and gets things done.